Porpoising
I have a 2013 Ext Cab Chevy Diesel 2500HD and a 2014 Cougar 28SGS with Resse Hitch that I just brought home this weekend. The truck on both cement and asphalt is porpoising to the point it was making...
Forum Discussion
I had the same problem with my TT. Tried new Rancho shocks but they weren't any different from the stock parts. Then I installed Bilstein shocks and it completely stopped the porpoising.
